Question Detail
Question
An inductor, L = 1H, in series with a resistor, R = 150Ω, are connected to an a.c. source 60V, 50Hz. Determine the impedance of the circuit.
Correct Answer
Option D is the correct answer.
Detailed Explanation
X_L = 2πfL = 2π×50×1 ≈ 314.2Ω, so Z = √(R²+X_L²) = √(150²+314.2²) ≈ 348Ω.
Hint
Calculate X_L first, then combine with R using Z = √(R²+X_L²).